<template>
	<div class="login-container">
		<el-form
				:model="loginForm"
				:rules="loginRules"
				auto-complete="on"
				class="login-form"
				label-position="left"
				ref="loginForm"
		>
			<h3 class="title">谷粒学院后台管理系统</h3>
			<el-form-item prop="username">
                <span class="svg-container">
                    <svg-icon icon-class="user"/>
                </span>
				<el-input
						auto-complete="on"
						name="username"
						placeholder="username"
						type="text"
						v-model="loginForm.username"
				/>
			</el-form-item>
			<el-form-item prop="password">
                <span class="svg-container">
                    <svg-icon icon-class="password"/>
                </span>
				<el-input
						:type="pwdType"
						@keyup.enter.native="handleLogin"
						auto-complete="on"
						name="password"
						placeholder="password"
						v-model="loginForm.password"
				/>
				<span @click="showPwd" class="show-pwd">
                    <svg-icon icon-class="eye"/>
                </span>
			</el-form-item>
			<el-form-item>
				<el-button
						:loading="loading"
						@click.native.prevent="handleLogin"
						style="width: 100%"
						type="primary"
				>
					登录
				</el-button>
			</el-form-item>
			<div class="tips">
				<span style="margin-right: 20px">username: admin</span>
				<span> password: admin</span>
			</div>
		</el-form>
	</div>
</template>

<script>
	import {isvalidUsername} from '@/utils/validate';

	export default {
		name: 'Login',
		data() {
			const validateUsername = (rule, value, callback) => {
				if (!isvalidUsername(value)) {
					callback(new Error('请输入正确的用户名'));
				} else {
					callback();
				}
			};
			const validatePass = (rule, value, callback) => {
				if (value.length < 5) {
					callback(new Error('密码不能小于5位'));
				} else {
					callback();
				}
			};
			return {
				loginForm: {
					username: 'admin',
					password: 'admin',
				},
				loginRules: {
					username: [
						{
							required: true,
							trigger: 'blur',
							validator: validateUsername,
						},
					],
					password: [
						{
							required: true,
							trigger: 'blur',
							validator: validatePass,
						},
					],
				},
				loading: false,
				pwdType: 'password',
				redirect: undefined,
			};
		},
		watch: {
			$route: {
				handler: function (route) {
					this.redirect = route.query && route.query.redirect;
				},
				immediate: true,
			},
		},
		methods: {
			showPwd() {
				if (this.pwdType === 'password') {
					this.pwdType = '';
				} else {
					this.pwdType = 'password';
				}
			},
			handleLogin() {
				this.$refs.loginForm.validate((valid) => {
					if (valid) {
						this.loading = true;
						this.$store
								.dispatch('Login', this.loginForm)
								.then(() => {
									this.loading = false;
									this.$router.push({path: this.redirect || '/'});
								})
								.catch(() => {
									this.loading = false;
								});
					} else {
						console.log('error submit!!');
						return false;
					}
				});
			},
		},
	};
</script>

<style lang="scss" rel="stylesheet/scss">
	$bg: #2d3a4b;
	$light_gray: #eee;

	/* reset element-ui css */
	.login-container {
		.el-input {
			display: inline-block;
			height: 47px;
			width: 85%;

			input {
				background: transparent;
				border: 0px;
				-webkit-appearance: none;
				border-radius: 0px;
				padding: 12px 5px 12px 15px;
				color: $light_gray;
				height: 47px;

				&:-webkit-autofill {
					-webkit-box-shadow: 0 0 0px 1000px $bg inset !important;
					-webkit-text-fill-color: #fff !important;
				}
			}
		}

		.el-form-item {
			border: 1px solid rgba(255, 255, 255, 0.1);
			background: rgba(0, 0, 0, 0.1);
			border-radius: 5px;
			color: #454545;
		}
	}
</style>

<style lang="scss" rel="stylesheet/scss" scoped>
	$bg: #2d3a4b;
	$dark_gray: #889aa4;
	$light_gray: #eee;
	.login-container {
		position: fixed;
		height: 100%;
		width: 100%;
		background-color: $bg;

		.login-form {
			position: absolute;
			left: 0;
			right: 0;
			width: 520px;
			max-width: 100%;
			padding: 35px 35px 15px 35px;
			margin: 120px auto;
		}

		.tips {
			font-size: 14px;
			color: #fff;
			margin-bottom: 10px;

			span {
				&:first-of-type {
					margin-right: 16px;
				}
			}
		}

		.svg-container {
			padding: 6px 5px 6px 15px;
			color: $dark_gray;
			vertical-align: middle;
			width: 30px;
			display: inline-block;
		}

		.title {
			font-size: 26px;
			font-weight: 400;
			color: $light_gray;
			margin: 0px auto 40px auto;
			text-align: center;
			font-weight: bold;
		}

		.show-pwd {
			position: absolute;
			right: 10px;
			top: 7px;
			font-size: 16px;
			color: $dark_gray;
			cursor: pointer;
			user-select: none;
		}
	}
</style>
